I'm looking for a manga were the main character in blackmailed because of some secret by a mean/sadistic female, older or in the same class. I'd rather not have a hentai but don't mind if it is adult/mature/ecchi.

Examples: Watashi ni xx Shinasai!
Ore no Kanojo to Osananajimi ga Shuraba Sugiru
Nozo x Kimi

DO NOT RECOMMEND: 4-Koma, Gender Bender, Lolicon, Shounen Ai, Yaoi, Cheating, Netorare or Rape.

Nozoki Ana same guy from nozo kimi

Yep. Currently reading that, forgot to put that in the examples.

DO NOT RECOMMEND: 4-Koma, Gender Bender, Lolicon, Shounen Ai, Yaoi, Cheating, Netorare or Rape.

I feel like Nozo kimi is supperior tho... it does have the same premise but the plot is so good 😀 love those slice of life with some other elements on it. and i love the fact it isnt a full harem ( jet tho )

I feel the same about the plot and when it comes to harem i prefer if it is 3-6 girl the 20 coz I start forgetting who is who.

DO NOT RECOMMEND: 4-Koma, Gender Bender, Lolicon, Shounen Ai, Yaoi, Cheating, Netorare or Rape.

Tetsuwan birdy have some elements of blackmail but its too soft tryng to think any other but they seem to evade me.

Thanks, doesn't seem too bad so far.

DO NOT RECOMMEND: 4-Koma, Gender Bender, Lolicon, Shounen Ai, Yaoi, Cheating, Netorare or Rape.

Aku no hana

You've probably already read it: Onani Master Kurosawa

Maybe these too:
Velvet Kiss
Shuukyuu Shoujo

Doreiku

Thanks but I'm already on Aku no Hana.

@sunder
Thanks, I've already read Velvet Kiss, Onani Master Kurosawa and I'm on Shuukyuu Shoujo.

@Tsubamex
I'm not into rape, don't mind reverse rape (female rapes male) coz its a lot littler.

DO NOT RECOMMEND: 4-Koma, Gender Bender, Lolicon, Shounen Ai, Yaoi, Cheating, Netorare or Rape.

What is the name of that short manga about a woman that blackmails her boss after taking pictures of him receiving a blowjob?

Oroka na Tenshi wa Akuma to Odoru

Have you tried Saiteihen no Otoko (Scumbag Loser)? The secret here is that the MC didn't have an actual girlfriend (the girl was pretending to be his gf to the rest of the class) The ending felt somewhat rushed/axed, but it was still awesome overall. I really wish it were longer.

@jackiejackie

It's Ikenai Candy Love

I'm in idol hell T.T